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Water retention and slow release type biological compound fertilizer and preparation method thereof

A biological compound fertilizer, slow-release technology, applied in the agricultural field, to solve the effects of poor stability, good biological efficacy, and low persistence

Inactive Publication Date: 2015-01-07
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the water-retaining and slow-release biological compound fertilizer with both water retention and slow release functions and microbial functions has not been reported yet.

Method used

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  • Water retention and slow release type biological compound fertilizer and preparation method thereof
  • Water retention and slow release type biological compound fertilizer and preparation method thereof
  • Water retention and slow release type biological compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Dilute 25% acrylic acid with distilled water, stir under an ice-water bath, neutralize with sodium hydroxide solution, the neutralization degree is 70%, add 15% acrylamide, 0.02% crosslinking agent, 0.02% initiator, 15% inorganic mineral raw materials and 35% urea, disperse and mix at 300 rpm for 30 minutes to obtain an aqueous phase system;

[0024] (2) Mix 1% dispersant with cyclohexane, disperse and mix evenly at 300 rpm under heating conditions, until the dispersant is completely dissolved, and obtain an oil phase system containing cyclohexane and dispersant;

[0025] (3) Under the condition of nitrogen protection, mix the water phase system and the oil phase system at a ratio of 1:3 (V / V), control the temperature at 70 ° C, disperse at a high speed at 500 rpm, react for 3 hours, cool to room temperature, filter, and recover the solution Reuse and dry the solid matter to obtain a series of granular fertilizer granules;

[0026] (4) Add the concentrated bacteria...

Embodiment 2

[0029] (1) Dilute 40% acrylic acid with distilled water, stir under ice water bath, neutralize with sodium hydroxide solution, the neutralization degree is 50%, add 30% acrylamide, 1% crosslinking agent, 1% initiator, 5% inorganic mineral raw materials and 20% urea, disperse and mix at 300 rpm for 30 minutes to obtain an aqueous phase system;

[0030] (2) Mix 2% dispersant with cyclohexane, disperse and mix at 300 rpm under heating conditions, until the dispersant is completely dissolved, and obtain an oil phase system containing cyclohexane and dispersant;

[0031] (3) Under the condition of nitrogen protection, mix the water phase system and the oil phase system at a ratio of 1:4 (V / V), control the temperature at 80°C, disperse at a high speed at 500 rpm, and react for 4 hours, cool to room temperature, filter, and recover the solution Reuse and dry the solid matter to obtain a series of granular fertilizer granules;

[0032] (4) Add the concentrated bacterial suspension to...

Embodiment 3

[0035] (1) After diluting 30% acrylic acid with distilled water, stir under an ice-water bath, neutralize with sodium hydroxide solution, the neutralization degree is 60%, add 20% acrylamide, 0.5% crosslinking agent, 0.5% initiator, 10% inorganic mineral raw materials and 30% urea, disperse and mix at 300 rpm for 30 minutes to obtain an aqueous phase system;

[0036] (2) Mix 1.5% dispersant with cyclohexane, disperse and mix at 300 rpm under heating conditions, until the dispersant is completely dissolved, and obtain an oil phase system containing cyclohexane and dispersant;

[0037] (3) Under the condition of nitrogen protection, mix the water phase system and the oil phase system at a ratio of 1:2 (V / V), control the temperature at 60 ° C, disperse at a high speed at 500 rpm, react for 2 hours, cool to room temperature, filter, and recover the solution Reuse and dry the solid matter to obtain a series of granular fertilizer granules;

[0038] (4) Add the concentrated bacteri...

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Abstract

The invention relates to a water retention and slow release type biological compound fertilizer and a preparation method thereof. The preparation method comprises the following steps: taking crylic acid, acrylamide, sodium bentonite and urea as raw materials, potassium persulfate as an initiator, N,N-methylene bisacrylamide as a cross-linking agent and Span 60 as a dispersing agent, preparing a water-retention and slow release type fertilizer by adopting a chemical synthesis method, absorbing a functional microbial strain by using the water retention and slow release type fertilizer, drying at a temperature of 40 DEG C and crushing to obtain a product. The water retention and slow release type biological compound fertilizer and the preparation method thereof have the benefits that the absorption rate of distilled water is larger than 700 g / g. The absorption rate of saline solution is larger than 150 g / g, the nitrogen content is higher than 15 percent, the early nitrogen release rate is less than 15 percent, the accumulative release rate within 28 days is less than 80 percent, the accumulative release rate during the nutrient release period is larger than 80 percent, and the effective number of living bacterium after the storage for six months is above 3*107 cfu / g; the germination rate and the seedling rate of seeds can be obviously improved; the water retention and slow release type biological compound fertilizer has the advantages of environmental friendliness, high convenience for application, stable performance and the like; the effects of saving the agricultural water and improving the fertilizer efficiency can be effectively realized; the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of agriculture, in particular to a water-retaining slow-release biological compound fertilizer and a preparation method thereof. Background technique [0002] In the second half of the 20th century, the rapid increase in population directly led to an increase in food demand, and in agricultural production, fertilizer and water have always played an important role. At this stage, the waste of water resources and the low utilization rate of fertilizers have brought about a series of problems such as soil hardening, salinization, and eutrophication of water bodies. Therefore, how to effectively improve the utilization rate of water and fertilizers and reduce the damage caused by soil problems to crops has become a problem that my country's agriculture must face. Therefore, it is imminent to carry out "water saving and water conservation" in agriculture and "reduction and efficiency improvement" of chemical fer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
CPCC05G3/00C05G3/90Y02P60/21
Inventor 武占省温鹏秦绍华韩亚杰张根林
Owner SHIHEZI UNIVERSITY
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